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If we weren’t the first industrial civilization on Earth, would we ever know?

Rochester UK (SPX) Apr 18, 2018
Imagine if, many millions of years ago, dinosaurs drove cars through cities of mile-high buildings. A preposterous idea, right? Over the course of tens of millions of years, however, all of the direct evidence of a civilization - its artifacts and remains - gets ground to dust. How do we really know, then, that there weren't previous industrial civilizations on Earth that rose and fell long befo